2021 Yamaha WR450F Cross Country Motorcycle

Ultimate Enduro Machine
All new for 2019, the WR450F™ builds on Yamaha’s exceptional motocross and cross country race platform with added features and unique settings designed to optimize the WR® for enduro riding.

Electric Starter System
Utilizing a compact starter motor system battery, the WR450F maintains the convenience of push-button starting, for effortless restarts and relaxed riding when the clock isn’t ticking.

Potent Fuel-Injected Engine
A high-compression cylinder head, forged piston, aggressive cam profiles, cylinder geometry and much more work together to give WR450F riders a broad spread of useable thrust with expanded high-rpm power.

Advanced Alloy Frame
Yamaha’s bilateral beam aluminium frame is derived straight from the YZ450F to centralize mass and provide an ideal balance between cornering feel and straight-line confidence.

Class-Leading Suspension
Yamaha uses KYB® spring-type forks of the WR450F, with industry leading function and easy tuneability for a wide range of conditions.

All-New High-Spec Enduro
For 2019, the new WR450F takes all the latest advancements found on the YZ450F and builds upon them to create the ultimate trail-ready enduro machine, with engine and chassis tuning optimized for accessible power, handling balance, and flexibility on every trail.

Rearward-Slanted Cylinder Design
The WR450F’s distinct rearward-slanted cylinder design—complete with rear exhaust and forward-mounted intake system—features a cylinder head that works with the frame geometry for optimized weight distribution. Inside, the engine features a straight intake tract, aggressive cam profiles, high-compression “box bridge” piston design with DLC-coated piston pin, and more.

Unique Enduro Engine Tuning
WR450F-specfic ignition and fuel injection maps are optimized for enduro riding and racing, for exceptionally smooth and controllable midrange power with longer-lasting pulling power in the top-end.

Enhanced Intake and Exhaust Systems
The WR450F features a new two-piece air filter with improved sealing that works in conjunction with the tuned intake tract length and new WR-specific muffler to boost the linear feeling of traction and drive.

High-Capacity Radiator
The WR450F uses a large radiator with excellent cooling capacity shared with the YZ450F motocrosser, complete with a cooling fan for consistent performance during the toughest enduro rides.

Electric Starter System
The WR450F features a compact electric starter system to simplify restarts on the trail and add convenience everywhere else.

Advanced Fuel Injection
The engine breathes through a 44mm Mikuni® throttle body fed by a high pressure electric pump to ensure optimum fuel atomization and power for a wide range of riding conditions.

Robust Transmission and Clutch
The 2019 WR450F’s wide-ratio 5-speed transmission is shared with the YZ450FX and enhances cross country performance for more flexible gearing selection in open terrain. The clutch system has also been reworked especially for the new WR450F for improved heat dissipation and lighter clutch lever effort.

Compact Body and Seat Design
The WR450F features stylish bodywork from tip to tail, including a large 2.15 gallon, mass-centralized fuel tank shared with the YZ450FX™. The body design is narrow for more comfortable knee grip and control feeling while the narrower seat gives the rider additional room to move aboard the machine. Even the rear fender is specially designed for added rigidity to make moving the machine easier.

Class-Leading Suspension
The WR450F’s industry-leading, fully adjustable KYB® coil spring-type fork with speed sensitive damping provides exceptional balance between handling and bump absorption, with updated mid-speed valving for improved feel at slower fork speeds. The linkage type rear suspension features a KYB® shock features a new coil spring for lighter weight without sacrificing durability as well as a larger oil reservoir for more consistent damping.

270mm Front Brake
Large 270mm front disc brake coupled with aggressive pad material offers outstanding braking performance and machine control, with exceptional stopping power and controllability.

Bore x Stroke

97.0mm × 60.8mm

Compression Ratio

13.0:1

Fuel Delivery

Mikuni® fuel injection, 44mm

KYB® Speed-Sensitive System inverted fork; fully adjustable, 12.2-in travel

Suspension / Rear

KYB® single shock; fully adjustable, 12.5-in travel

Brakes / Front

Hydraulic single disc brake, 270mm

Brakes / Rear